<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				margin: 0;
				padding: 0;
				divst-style: none;
			}
			.nav{
				width: 304px;
				height: 40px;
				list-style: none;
				margin: 100px auto;
			}
			.nav>li{
				width: 100px;
				height: 40px;
				line-height: 40px;
				text-align: center;
				float: left;
				border: 1px solid #666;
				background: #AAAAAA;
			}
			.nav>li:first-child{
				border-right: none;
			}
			.nav>li:last-child{
				border-left: none;
			}
			.sub{
				list-style: none;
				background: #FF4500;
			}
			.sub>li{
				border: 1px solid #fff;
			}
			.sub{
				display: none;
			}
		</style>
	</head>
	<body>
		<ul class="nav">

			<li>一级菜单
				<ul class="sub">
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
				</ul>
			</li>
			<li>一级菜单
				<ul class="sub">
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
				</ul>
			</li>
			<li>一级菜单
				<ul class="sub">
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
					<li>二级菜单</li>
				</ul>
			</li>
		</ul>
		<script src="js/jquery.js"></script>
		<script src="js/pulldownmenu.js"></script>
	</body>
</html>
